1920986855424 has 1440 divisors, whose sum is σ = 7345043465760. Its totient is φ = 497074765824.

The previous prime is 1920986855387. The next prime is 1920986855453. The reversal of 1920986855424 is 4245586890291.

1920986855424 is a `hidden beast` number, since 1 + 9 + 2 + 0 + 9 + 8 + 6 + 85 + 542 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 36245034982 + ... + 36245035034.

It is an arithmetic number, because the mean of its divisors is an integer number (5100724629).

Almost surely, 2^{1920986855424} is an apocalyptic number.

1920986855424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1920986855424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3672521732880).

1920986855424 is an abundant number, since it is smaller than the sum of its proper divisors (5424056610336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1920986855424 is an frugal number, since it uses more digits than its factorization.

1920986855424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 63.

The spelling of 1920986855424 in words is "one trillion, nine hundred twenty billion, nine hundred eighty-six million, eight hundred fifty-five thousand, four hundred twenty-four".